source: EcnlProtoTool/trunk/musl-1.1.12/include/netinet/tcp.h@ 321

#ifndef _NETINET_TCP_H
#define _NETINET_TCP_H

#include <features.h>

#define TCP_NODELAY 1
#define TCP_MAXSEG       2
#define TCP_CORK         3
#define TCP_KEEPIDLE     4
#define TCP_KEEPINTVL    5
#define TCP_KEEPCNT      6
#define TCP_SYNCNT       7
#define TCP_LINGER2      8
#define TCP_DEFER_ACCEPT 9
#define TCP_WINDOW_CLAMP 10
#define TCP_INFO         11
#define TCP_QUICKACK     12
#define TCP_CONGESTION   13
#define TCP_MD5SIG       14
#define TCP_THIN_LINEAR_TIMEOUTS 16
#define TCP_THIN_DUPACK  17
#define TCP_USER_TIMEOUT 18
#define TCP_REPAIR       19
#define TCP_REPAIR_QUEUE 20
#define TCP_QUEUE_SEQ    21
#define TCP_REPAIR_OPTIONS 22
#define TCP_FASTOPEN     23
#define TCP_TIMESTAMP    24
#define TCP_NOTSENT_LOWAT 25

#define TCP_ESTABLISHED  1
#define TCP_SYN_SENT     2
#define TCP_SYN_RECV     3
#define TCP_FIN_WAIT1    4
#define TCP_FIN_WAIT2    5
#define TCP_TIME_WAIT    6
#define TCP_CLOSE        7
#define TCP_CLOSE_WAIT   8
#define TCP_LAST_ACK     9
#define TCP_LISTEN       10
#define TCP_CLOSING      11

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define SOL_TCP 6
#include <sys/types.h>
#include <sys/socket.h>
#include <stdint.h>
#include <endian.h>

typedef uint32_t tcp_seq;

#define TH_FIN 0x01
#define TH_SYN 0x02
#define TH_RST 0x04
#define TH_PUSH 0x08
#define TH_ACK 0x10
#define TH_URG 0x20

struct tcphdr {
#ifdef _GNU_SOURCE
#ifdef __GNUC__
        __extension__
#endif
        union { struct {

        uint16_t source;
        uint16_t dest;
        uint32_t seq;
        uint32_t ack_seq;
#if __BYTE_ORDER == __LITTLE_ENDIAN
        uint16_t res1:4;
        uint16_t doff:4;
        uint16_t fin:1;
        uint16_t syn:1;
        uint16_t rst:1;
        uint16_t psh:1;
        uint16_t ack:1;
        uint16_t urg:1;
        uint16_t res2:2;
#else
        uint16_t doff:4;
        uint16_t res1:4;
        uint16_t res2:2;
        uint16_t urg:1;
        uint16_t ack:1;
        uint16_t psh:1;
        uint16_t rst:1;
        uint16_t syn:1;
        uint16_t fin:1;
#endif
        uint16_t window;
        uint16_t check;
        uint16_t urg_ptr;

        }; struct {
#endif

        uint16_t th_sport;
        uint16_t th_dport;
        uint32_t th_seq;
        uint32_t th_ack;
#if __BYTE_ORDER == __LITTLE_ENDIAN
        uint8_t th_x2:4;
        uint8_t th_off:4;
#else
        uint8_t th_off:4;
        uint8_t th_x2:4;
#endif
        uint8_t th_flags;
        uint16_t th_win;
        uint16_t th_sum;
        uint16_t th_urp;

#ifdef _GNU_SOURCE
        }; };
#endif
};
#endif

#ifdef _GNU_SOURCE
#define TCPI_OPT_TIMESTAMPS     1
#define TCPI_OPT_SACK           2
#define TCPI_OPT_WSCALE         4
#define TCPI_OPT_ECN            8

#define TCP_CA_Open             0
#define TCP_CA_Disorder         1
#define TCP_CA_CWR              2
#define TCP_CA_Recovery         3
#define TCP_CA_Loss             4

struct tcp_info
{
        uint8_t tcpi_state;
        uint8_t tcpi_ca_state;
        uint8_t tcpi_retransmits;
        uint8_t tcpi_probes;
        uint8_t tcpi_backoff;
        uint8_t tcpi_options;
        uint8_t tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
        uint32_t tcpi_rto;
        uint32_t tcpi_ato;
        uint32_t tcpi_snd_mss;
        uint32_t tcpi_rcv_mss;
        uint32_t tcpi_unacked;
        uint32_t tcpi_sacked;
        uint32_t tcpi_lost;
        uint32_t tcpi_retrans;
        uint32_t tcpi_fackets;
        uint32_t tcpi_last_data_sent;
        uint32_t tcpi_last_ack_sent;
        uint32_t tcpi_last_data_recv;
        uint32_t tcpi_last_ack_recv;
        uint32_t tcpi_pmtu;
        uint32_t tcpi_rcv_ssthresh;
        uint32_t tcpi_rtt;
        uint32_t tcpi_rttvar;
        uint32_t tcpi_snd_ssthresh;
        uint32_t tcpi_snd_cwnd;
        uint32_t tcpi_advmss;
        uint32_t tcpi_reordering;
        uint32_t tcpi_rcv_rtt;
        uint32_t tcpi_rcv_space;
        uint32_t tcpi_total_retrans;
        uint64_t tcpi_pacing_rate;
        uint64_t tcpi_max_pacing_rate;
};

#define TCP_MD5SIG_MAXKEYLEN    80

struct tcp_md5sig
{
        struct sockaddr_storage tcpm_addr;
        uint16_t __tcpm_pad1;
        uint16_t tcpm_keylen;
        uint32_t __tcpm_pad2;
        uint8_t tcpm_key[TCP_MD5SIG_MAXKEYLEN];
};

#endif

#endif